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CLEVELAND, OH - JULY 18:  Presumptive Republican presidential nominee Donald Trump gestures to his wife Melania after she delivered a speech on the first day of the Republican National Convention on July 18, 2016 at the Quicken Loans Arena in Cleveland, Ohio. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicks off on July 18.  (Photo by Alex Wong/Getty Images)
CLEVELAND, OH - JULY 18:  Presumptive Republican presidential nominee Donald Trump gestures to his wife Melania after she delivered a speech on the first day of the Republican National Convention on July 18, 2016 at the Quicken Loans Arena in Cleveland, Ohio. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. The four-day Republican National Convention kicks off on July 18.  (Photo by Alex Wong/Getty Images)

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Inside 'The Circus' of the U.S. presidential race

Christiane Amanpour speaks to John Heilemann and Mark McKinnon at the Republican convention about "The Circus," their show on the presidential campaign trail.

Inside 'The Circus' of the U.S. presidential race

Christiane Amanpour speaks to John Heilemann and Mark McKinnon at the Republican convention about "The Circus," their show on the presidential campaign trail.